1mm

• Many useful properties of known extended structure materials suggest that enhanced or new behavior remain to be discovered

• Greater structure and electronic degrees of freedom in complicated structures

Crystal-Chemical Relationships of Correlated Electronic MaterialsJulia Y. Chan (Department of Chemistry, Louisiana State University)

DMR-0237664

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(

-c

m)

T (K)

Sn

Ln

Co

La3Co4Sn13Tc = 2.8 K

Ln3Co4Sn13 (Ln = La, Ce) have been grown in single

crystalline form from a Sn flux. Their crystal structures are compared to the A′A′′3B4O12-type

perovskites. The La compound displays conventional type II superconductivity below Tc = 2.8 K. Evidence

of a heavy fermionic character is seen in the heat capacity data for the Ce compound which has a large enhanced specific heat coefficient at low temperatures.

1 mm1 mm

Education & Outreach:

Crystal-Chemical Relationships of Correlated Electronic MaterialsDMR-0237664

Current Graduate Students: Willa Williams, Evan Thomas, Jasmine Millican, Dixie Gautreaux, Edem Okudzeto, Jung Young Cho (3 Female, 3 African Americans)Undergraduates: Andrew Bankston, Michael Parent, Shayla Thomas, Shirley Lui, Daniel Hembree Summer Visitors:Daniel Jang (High school student) and Gerald R. Weatherspoon (George Mason University)

Graduate & Undergraduates performing chemistry demonstrations to > 100 children

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